No, king never once uses a sword technique. You can go check. King has named attacks using his Lunarian fire abilities. King has named attacks using his full zoan mode. And he has named attacks combining his zoan form with his lunarian abilities
King uses his sword for like half the entire fight and yet AT NO POINT does King ever use a single named sword technique… even his trick sword move that steals Zoro’s swords is unnamed
So no, Roger and Shanks ARE NOT like King… They EXPLICITLY USE SWORD TECHNIQUES… Which king Does Not
Anyway so I assume you agree with this then?